speedy

why do u want to know do u have any steering issue if you are planning on changing the powersteering make sure you bleed the fluid and replace it with new one

GS 400 is the best well i hope to have it one day

did you check the fuse if they are working. and when you star the car are the back lights on ( not brake lights but the ones that are above them). check these two things and i am sure you will find your answer.

it really depends on the usage and maintenance of the tiers if you are not using the car too often or if u rotate them time to time, check the pressure then they last longer the best is check its tread with a tire tread depth gauge and if the measurement is minimum of 1.6 mm then anything less the the tiers has to be changed.

Noise may be from tappets or lifter/rockers. Some time this noise get automatically adjusted after the timing belt change and dissaear after few 100 km when valve adjust their setting. If it stays too long then its a concern.

Let some mechanic visually check the car fully. May be some hoses or clamp is leaking or even radiator. If its fine leak its difficult to spot.

Check the fuses and relay pertaining to steering pump.

Have you got the OEM engine fan? Very important part of engine cooling. Check you AC fan is fine or not? Check your radiator isnt blocked or clogged. Check the thermostat is opening and closing on set temp (80 degree).

Dont know precisely but roughly it should not exceed more than 50 dhs - 100 dhs for installation and may be 150 - 200 dhs tops for spark plugs.

Not really its one of the main long life item only to be changed when it fails It usually run 50k kms easily.

traction light comes for seconds when you loose traction and it supposed to switch off as soon as car is in control and have full traction. It sometimes appear of its own as a electronic malfaunctioning that you can clear it with OBD tool. if it read some fault code recorded get that thing fix as its telling you that traction control is switched off due that problem.

I have a lexus GX470 the radio power is on but no sound some time it comes on but most time no volume the control do not change. should i change my music system and if i should which one